Which of the following symptoms indicates a BAC of 0.03?

A Blood Alcohol Concentration (BAC) of 0.03 is often associated with mild effects on a person's behavior and physiological functions. At this level, individuals may begin to experience slight impairments in their mental and motor functions. Slowed reactions are a key symptom observed as alcohol begins to affect the nervous system. This can lead to delayed response times, which can be significant when driving or performing tasks that require quick reflexes.

While the other symptoms can become more pronounced at higher BAC levels, they are not typically associated with a BAC of 0.03. For instance, impaired vision, poor coordination, and increased risk-taking behavior usually appear or become more evident at higher alcohol concentrations in the bloodstream. Understanding these nuances of BAC effects is critical for recognizing potential impairment levels in individuals and assessing their fitness for tasks such as driving.